Page 5 - classification of elements
P. 5
Sub-shell /orbitals (Energy levels): The specific path of
electron in a shell is called sub-shell. The maximum no. of
electron that can be accommodate in different sub-shell are
as below.
The table below shows the sub-shell of a shell of an atom
with their maximum no. of electrons.
S.N Sub-shell Maximum no.
of electrons
1. s (sharp) 2
2. p(principle) 6 Shells K L M N
Sub-shells s s p s p d s p d f
3. d(diffuse) 10
4. f(fundamental) 14
No. of 2 2 6 2 6 10 2 6 10 14
electrons

